Last updated: August 21, 2025
January in Santa Rosa, Argentina brings a warm embrace, with temperatures soaring up to a sizzling 42°C (107°F) and averaging a comfortable 26°C (80°F). While daytime heat prevails, evenings cool off to a refreshing 8°C (47°F). Rainfall is moderate, with about 58 mm (2.3 in) of precipitation spread over 9 days, contributing to the region's steadfast humidity level of 40%. This blend of warm temperatures and occasional rain makes January an intriguing time to experience the vibrant landscapes and dynamic weather of Santa Rosa.
In January, Santa Rosa, Argentina, experiences a warm summer, with temperatures oscillating from a brisk 8°C (47°F) at night to a scorching 42°C (107°F) at the peak of the day, resulting in a comfortable average of 26°C (80°F). This month sets the tone for the season, showcasing the region's capacity for intense heat tempered by cooler evenings. As the calendar turns to February, the nights warm slightly to 10°C (50°F), while the daytime highs remain impressive at 41°C (106°F). Gradually, as March approaches, a notable cooling trend begins, with temperatures dipping in the morning to 4°C (39°F) and maximums retreating to 37°C (99°F) by the month’s end. This gentle descent continues into the autumn months, where April brings even cooler averages and May introduces the first frosts, reminding visitors of the stark seasonal shifts. Throughout the year, the transition from the blistering summer of January to the cooler temperatures of winter reflects the dynamic climate that characterizes Santa Rosa, making it a fascinating destination for those who appreciate the ebb and flow of nature's warmth.
In January, Santa Rosa, Argentina experiences its wet season, with precipitation measuring 58 mm (2.3 in) across about 9 days. This moderate rainfall not only sets the tone for the month but also indicates a gradual increase into February, where precipitation slightly rises to 60 mm (2.4 in). As the months progress, there's a notable decline, with March bringing 48 mm (1.9 in) and April dropping to 33 mm (1.3 in), highlighting a trend towards drier conditions. By June and July, precipitation dwindles to a mere 8 mm (0.3 in) and 7 mm (0.3 in), respectively, showcasing the stark transition to a much drier winter season. This recurring pattern emphasizes the seasonal shifts in rainfall in Santa Rosa, revealing a vibrant interplay between wetter summers and arid winters.
In January, Santa Rosa experiences a relatively dry month, with humidity levels sitting at 40%—an ideal time for outdoor activities under the warm summer sun. As the season transitions into February, the humidity begins to rise slightly to 46%, marking the start of a gradual increase. This trend continues, peaking in May at 69%, where the air feels more humid as autumn approaches. Following this peak, there’s a subtle decline through the colder months, with humidity levels hovering around the mid-60s before descending towards 44% in November and dropping to 35% by December. This pattern illustrates a clear seasonal rhythm in humidity, providing a refreshing shift from the dry summer to the captivating lushness of autumn and the brisk air of winter.
In January, Santa Rosa, Argentina, experiences a striking UV Index of 15, categorizing it as extreme, with a rapid burn time of just 10 minutes. This trend of high UV levels is consistent, as the index remains at 13 in February and 12 in March, highlighting the need for sun protection during these summer months. As the seasons transition into autumn, the UV Index drops significantly, falling to 8 in April and 5 in May, reflecting a shift to very high and moderate exposure categories, respectively. By mid-year, from June to July, the UV Index stabilizes at 4, indicating lower sun intensity. However, it rises again in spring and summer, with extreme levels returning in October with a UV Index of 12, peaking once more at 14 in November and cycling back to 15 in December. This annual pattern emphasizes the importance of staying vigilant against UV exposure, especially during the critical summer months. For more detailed information, check out Santa Rosa UV Index.
UV Risk Categories
In January, Santa Rosa basks in an impressive 311 hours of sunshine, marking the height of summer and inviting locals and visitors alike to enjoy the warm days. This radiant month is just the beginning of a pattern, as February sees an increase to 324 hours, continuing the trend of abundant sunlight. However, by March and April, the sunshine slightly wanes, settling at 323 hours and 274 hours respectively. As the seasons shift towards winter, the total decreases further, with May bringing 264 hours and June dipping to 257 hours. Yet, this isn’t an enduring decline; from July’s 275 hours onward, sunshine returns more robustly, with August displaying 313 hours. The trend becomes even more pronounced as the year progresses, culminating in the peak sunshine months of November and December, where residents enjoy 370 and 392 hours respectively. This rhythmic cycle showcases Santa Rosa's vibrant climate, making it a delightful destination for sun-seekers year-round.
January in Santa Rosa, Argentina, boasts a 69% chance of sunshine, setting a delightful tone for the summer month. This likelihood slightly surpasses February’s 64% but dips below the warmth of April's 71%. Notably, the sun shines brightest during the mid-year with July reaching an impressive 87% sun probability, while the tail end of the year exhibits more fluctuation. As the months progress from March's 57% to December's 62%, it's clear that summer shines prominently, making January a sweet spot for sun-seekers eager to bask in the warm, radiant glow of Argentine summer.
In Santa Rosa, Argentina, January ushers in the longest days of the year, with an impressive 14 hours of daylight that invite outdoor adventures and sun-soaked activities. As the months progress into February and March, the sun gently retreats, decreasing to 13 and 12 hours respectively, signaling the transition into cooler seasons. By the time April rolls around, daylight shrinks to 11 hours, and by June, it reaches its annual low at just 9 hours. However, the daylight duration begins to rebound in July, remaining stable at 10 hours, before gradually increasing through the spring months. By December, residents experience another burst of light with 14 hours, completing a refreshing cycle of daylight throughout the year. This rhythmic ebb and flow of sunlight not only marks the changing seasons but also shapes the lifestyle and activities in this vibrant city.
January in Santa Rosa, Argentina, greets residents and visitors with a gentle average wind speed of 3.9 m/s (9 mph), setting the stage for a balmy summer atmosphere. As the month unfolds, the winds remain consistently mild, slightly tapering off to 3.1 m/s (7 mph) in February. The trend continues with similar breeziness through March and April, where 3.2 m/s (7 mph) becomes the norm, creating a serene backdrop for outdoor activities. As autumn approaches, a gradual decline emerges, with May witnessing the softest breezes at 2.8 m/s (6 mph), which linger into the cooler winter months. However, a modest uptick in wind speed can be noted again in September, reaching 4.0 m/s (9 mph) before settling back to a more gentle pace. This rhythmic ebb and flow of wind not only enhances the charm of Santa Rosa but also signifies the shifting seasons, making each month a unique experience in this picturesque locale.
Weather in Santa Rosa varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Santa Rosa, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, temperatures range from a minimum of 8°C (47°F) to a maximum of 42°C (107°F), with an average temperature of 26°C (80°F). The month experiences approximately 58 mm (2.3 in) of precipitation over 9 days and has a humidity level of 40%. In contrast, February sees slightly warmer temperatures, with a minimum of 10°C (50°F) and a maximum of 41°C (106°F), and an average of 24°C (76°F). Precipitation increases slightly to 60 mm (2.4 in) over 8 days, while humidity rises to 46%. For more detailed information on February weather, visit Santa Rosa weather in February.
In January, the weather is significantly warmer with temperatures ranging from a minimum of 8°C (47°F) to a scorching maximum of 42°C (107°F), coupled with an average of 26°C (80°F). The month sees a total precipitation of 58 mm (2.3 in) over about 9 days, with humidity at 40%. In contrast, March experiences milder conditions, with temperatures dipping to a low of 4°C (39°F) and maxing out at 37°C (99°F), averaging 22°C (71°F). Precipitation slightly decreases to 48 mm (1.9 in) over 7 days, and humidity levels rise to 54%. For a more detailed look at the weather specifics, you can check Santa Rosa weather in March.
In January, the weather is characterized by high temperatures, with minimums of 8°C (47°F) and maximums soaring up to 42°C (107°F), resulting in an average of 26°C (80°F). The humidity is relatively low at 40%, and the month experiences about 58 mm (2.3 in) of precipitation over 9 days. In contrast, April features a much cooler climate, starting with minimum temperatures of 2°C (36°F) and averaging 18°C (64°F) with maximum temperatures reaching 32°C (90°F). Although it experiences less precipitation at 33 mm (1.3 in) over just 5 days, the humidity rises to 65%. For a detailed look at the weather in April, you can visit Santa Rosa weather in April.
January and May present striking contrasts in weather patterns. January boasts warm temperatures, with averages reaching up to 26°C (80°F) and maximums soaring to 42°C (107°F), while May experiences a much cooler climate, with average temperatures around 13°C (55°F) and maximums of 28°C (83°F). Precipitation is notably higher in January at 58 mm (2.3 in), occurring over approximately 9 days, compared to May's lower 29 mm (1.1 in) over just 3 days. Additionally, humidity levels are significantly different; January's humidity sits at 40%, whereas May sees a rise to 69%, contributing to a more damp and brisk atmosphere. For a more detailed look at May's weather, you can check Santa Rosa weather in May.
In January, the weather tends to be hot and dry, with temperatures ranging from a minimum of 8°C (47°F) to a sweltering maximum of 42°C (107°F) and an average of 26°C (80°F). With 58 mm (2.3 in) of precipitation over about 9 days, the humidity hovers around 40%, creating a striking contrast to the cooler, more humid conditions in June.
In contrast, June experiences much milder temperatures, ranging from a chilly minimum of -4°C (25°F) to a comfortable maximum of 26°C (79°F), with an average temperature of 9°C (48°F). The month sees significantly less rainfall, with only 8 mm (0.3 in) of precipitation over just 2 days, but the humidity is higher at 64%, contributing to a different atmospheric feel. For more details, you can check Santa Rosa weather in June.
In January, the weather is notably hot, with temperatures peaking at a scorching 42°C (107°F) and averaging around 26°C (80°F). This month experiences higher levels of precipitation, averaging 58 mm over about 9 days, coupled with lower humidity at 40%. In contrast, July offers a much cooler climate, where temperatures drop to a maximum of 23°C (74°F) and average around 8°C (47°F). This month sees significantly less precipitation, with only 7 mm falling over just 1 day, and a higher humidity level of 65%. For more detailed information about the weather patterns, check out Santa Rosa weather in July.
The weather in January showcases a stark contrast to that of August in Santa Rosa. In January, temperatures soar with highs averaging 42°C (107°F), while the minimum remains relatively warm at 8°C (47°F). With an average temperature of 26°C (80°F) and around 58 mm (2.3 in) of precipitation over 9 days, the moisture levels are relatively lower, accompanied by a humidity of 40%.
In August, on the other hand, temperatures take a significant drop, with an average maximum of only 31°C (88°F) and a minimum plunging to -4°C (25°F). Precipitation is minimal at just 4 mm (0.1 in) over 1 day, accompanied by higher humidity at 60%. This shift from the scorching heat of January to the much cooler temperatures of August reflects the diverse climate variations experienced throughout the year. For a closer look at August's weather specifics, you can visit Santa Rosa weather in August.
In January, Santa Rosa experiences a warm climate with temperatures ranging from a minimum of 8°C (47°F) to a scorching maximum of 42°C (107°F), averaging around 26°C (80°F). This month also sees a relatively higher level of precipitation at 58 mm (2.3 inches) over 9 days, accompanied by a humidity level of 40%. In contrast, September presents a much cooler atmosphere, with temperatures dipping down to a minimum of -2°C (28°F) and peaking at 36°C (96°F), averaging 16°C (61°F). The month features significantly less rainfall, with only 9 mm (0.4 inches) over just 1 day, and an increased humidity level of 51%. For more detailed information on the weather in September, you can visit Santa Rosa weather in September.
January and October present contrasting weather patterns. In January, temperatures soar with a minimum of 8°C (47°F) and an average high reaching 42°C (107°F), alongside a total of 58 mm (2.3 in) of precipitation over 9 days and 40% humidity. In stark contrast, October experiences cooler temperatures, with a minimum of 0°C (32°F) and an average of 19°C (67°F), as well as reduced rainfall of 25 mm (1.0 in) spread over just 4 days, resulting in higher humidity at 49%. For a closer look at October weather in the region, you can check out Santa Rosa weather in October.
In January, the weather is typically hotter, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 42°C (107°F) and an average of 26°C (80°F). The month sees about 58 mm (2.3 in) of precipitation over approximately 9 days, coupled with a lower humidity level of 40%. In contrast, November offers slightly cooler temperatures, with a minimum of 6°C (42°F), an average of 23°C (74°F), and a maximum of 41°C (105°F). Precipitation in November is less at 46 mm (1.8 in) spread over 8 days, and humidity is marginally higher at 44%. For a closer look at the weather details, visit Santa Rosa weather in November.
In January, the weather in Santa Rosa is characterized by higher temperatures, with a minimum of 8°C (47°F) and an average of 26°C (80°F), compared to December's slightly warmer minimum of 12°C (53°F) and average of 25°C (78°F). Both months experience a maximum temperature of 42°C (107°F), but January receives more precipitation at 58 mm (2.3 in) over 9 days, while December has 40 mm (1.6 in) over 8 days. Additionally, January's humidity is higher at 40%, compared to December's 35%, making January feel a bit more humid and warmer overall. For a detailed look at December weather, check out Santa Rosa weather in December.
January stands out in Santa Rosa's weather calendar with its warm temperatures and relatively low humidity, offering an inviting atmosphere for outdoor activities. Unlike the cooler months, where temperatures dip significantly, January boasts an average that encourages both locals and visitors to enjoy the sunshine. While precipitation is light with a few rainy days, the warmth prevails, creating a striking contrast to the chillier, wetter seasons. For those planning to explore during this vibrant month, understanding the unique characteristics of January can enhance your experience. For more detailed insights on what to expect throughout the year, check out Santa Rosa Climate.